[英]Spring REST Service with IOC?
过去,我使用Spring和IOC(application-context.xml,其中我的控制器具有2个不同的DAO等,并且Spring为我设置了它们)做了一些简单的SOAP服务。
现在,我尝试使用Spring进行REST服务。
我的控制器看起来像这样
@RestController
@RequestMapping("/")
public class MyController {
private MyDAO1 myDAO1;
private MyDAO2 myDAO2;
@RequestMapping("/name")
public MyTest getGreeting() {
MyTest tst = new MyTest(1, "Hallo ");
return tst;
}
public void setMyDAO1(MyDAO1 myDAO1) {
this.myDAO1 = myDAO1;
}
public void setMyDAO2(MyDAO2 myDAO2) {
this.myDAO2 = myDAO2;
}
我的rest-servlet.xml包含以下内容:
<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans" xmlns:context="http://www.springframework.org/schema/context" xmlns:mvc="http://www.springframework.org/schema/mvc" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:p="http://www.springframework.org/schema/p"
xsi:schemaLocation="
http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans-4.0.xsd
http://www.springframework.org/schema/context
http://www.springframework.org/schema/context/spring-context-4.0.xsd
http://www.springframework.org/schema/mvc
http://www.springframework.org/schema/mvc/spring-mvc-4.0.xsd">
<!-- Configure to plugin JSON as request and response in method handler -->
<bean class="org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter">
<property name="messageConverters">
<list>
<ref bean="jsonMessageConverter" />
</list>
</property>
</bean>
<!-- Configure bean to convert JSON to POJO and vice versa -->
<bean id="jsonMessageConverter" class="org.springframework.http.converter.json.MappingJackson2HttpMessageConverter">
</bean>
<bean id="txManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
<property name="dataSource" ref="dataSource" />
</bean>
<bean id="dataSource" class="org.springframework.jndi.JndiObjectFactoryBean">
<property name="jndiName" value="java:comp/env/jdbc/InformixDB" />
<property name="resourceRef" value="true" />
</bean>
<bean id="myDAO1" class="com.test.dao.MyDAO1">
<property name="dataSource" ref="dataSource" />
</bean>
<bean id="myDAO2" class="com.test.dao.MyDAO2">
<property name="dataSource" ref="dataSource" />
</bean>
<bean id="myController" class="com.test.controller.MyController">
<property name="myDAO1" ref="myDAO1" />
<property name="myDAO2" ref="myDAO2" />
</bean>
<context:component-scan base-package="com.test.controller.myController" />
<mvc:annotation-driven />
现在我得到了错误
java.lang.IllegalStateException: Ambiguous mapping found. Cannot map 'myController' bean method
public com.test.entity.MyTest com.test.controller.MyController.getGreeting()
to {[//name],methods=[],params=[],headers=[],consumes=[],produces=[],custom=[]}: There is already 'myController' bean method
public com.test.entity.MyTest com.test.controller.MyController.getGreeting() mapped.
当我删除RequestMapping批注时,可以将其部署在tomcat上,但是我不知道如何调用该服务
org.springframework.web.servlet.DispatcherServlet noHandlerFound
WARNING: No mapping found for HTTP request with URI [/MyTestService/getGreeting] in DispatcherServlet with name 'rest'
“ rest”是web.xml中的servlet映射
我想念什么?
您将控制器加载两次,而Spring尝试将其映射两次:
rest-servlet.xml
声明 @RestController
注释和rest-servlet.xml
的标签<context:component-scan base-package="de.cat.auftrag.controller" />
,它被发现为带注释的控制器。 您应该:
rest-servlet.xml
删除声明<bean id="myController" ...
,但是您必须自动连接DAO。 <context:component-scan ...
标记。 为什么要麻烦做Spring已经为您做的事情?
@Controller // << See Here
@RequestMapping("/")
public class MyController {
@Autowired // << See Here
private MyDAO1 myDAO1;
@Autowired // << See Here
private MyDAO2 myDAO2;
@RequestMapping("/name")
public MyTest getGreeting() {
MyTest tst = new MyTest(1, "Hallo ");
return tst;
}
您的网址很可能是基本软件包中的最后一个软件包。 在这种情况下, http://url:8080/rest/controller
并删除。
<bean id="myController" class="com.test.controller.MyController">
<property name="myDAO1" ref="myDAO1" />
<property name="myDAO2" ref="myDAO2" />
</bean>
如果您想学习Spring ...,您将不得不选择毒药。 使用XML或注释。 混合两者是非常漫长而艰苦的学习过程的秘诀。
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